rf2137 RF Micro Devices, rf2137 Datasheet - Page 3

• Manufacturer Part Number: rf2137
• Description: Linear Power Amplifier
• Manufacturer: RF Micro Devices

Rev B2 010720
RF IN
Base
Pkg
VCC
PC
Pin
J1
1
2
3
4
5
6
7
8
3.3 F
C8
50
Function
RF OUT
RF OUT
RF OUT
RF OUT
RF IN
GND
GND
VCC
strip
PC
1 nF
C9
100 pF
100 pF
C3
C5
Description
Power supply for the driver stage, and interstage matching. Shunt
inductance is required on this pin, which can be achieved by an induc-
tor to V
the inductor is frequency dependent; 3.3nH is required for 830MHz,
and 1.2nH for 950MHz. Instead of an inductor, a high impedance
microstrip line can be used.
RF input. This is a 50
on the interstage matching network connected to pin 1. An external DC
blocking capacitor is required if this port is connected to a DC path to
ground or a DC voltage.
Ground connection. Keep traces physically short and connect immedi-
ately to the ground plane for best performance.
Power Control. When this pin is "low", all circuits are shut off. A "low" is
typically 0.5V or less at room temperature. During normal operation
this pin is the power control. Control range varies from about 2V for
0dBm to V
can be achieved depends on the actual output matching. PC should
never exceed 6.0V or V
RF Output and power supply for the output stage. The three output pins
are combined, and bias voltage for the final stage is provided through
these pins. The external path must be kept symmetric until combined to
ensure stability. An external matching network is required to provide the
optimum load impedance; see the application schematics for details.
Same as pin 5.
Same as pin 5.
Same as pin 5.
Ground connection. The backside of the package should be connected
to the ground plane through a short path, i.e., vias under the device
may be required.
10 k
1 nF
R1
C7
1.8 nH
(Download Bill of Materials from www.rfmd.com.)
CC
L1
Evaluation Board Schemat ic
, with a decoupling capacitor on the V
CC
for +31dBm RF output power. The maximum power that
1
2
3
4
CC
input, but the actual input impedance depends
PACKAGE BASE
, whichever is lowest.
2137400A
BIAS
CC
8
7
6
5
side. The value of
4.7 nH
L2
100 pF
1.5 pF
1.5 nH
C1
C6
L3
Interface Schematic
See pin 1.
See pin 5.
See pin 5.
See pin 5.
7.5 pF
100 pF
C2
C4
P1-1
P1-3
PC
RF IN
RF2137
From Bias
Stages
From Bias
Stages
50
P1
1
2
3
RF OUT
strip
VCC
GND
PC
VCC
To RF
Transistors
RF OUT
2-117
J2
2